//ww:error "arithmetic on non-numeric type"
// Lifted from test/wcc/949_idxfield_compound_run.c reject row "fld_he_slice"
// (#33/rule-7): a compound assign on an indexed-element SLICE field is unwired
// in both stages and MUST loud-fail. The substring is the shared diagnostic
// body — byte-identical on both stages, pinned to "slice field" so it cannot
// also match the float/str/tagged rows (no file:line, no cstage "ww: " prefix
// — both differ cs vs ww).
package main;
type S = struct { f: []u8, g: i32 };
export fn main() i32 = {
	let b: [2]u8 = [1u8, 2u8];
	let xs: [2]S = [S{f=b[0:2], g=0}, S{f=b[0:2], g=0}];
	xs[0].f += b[0:1];
	return 0;
};